110 kV快速SF6机械隔离开关断口的优化设计  

Optimization Design of Break in 110 kV SF Ultra-fast Mechanical Disconnector

作　　者：周雁南 黄瑜珑[1] 刘慧 王加磊 杨超[2] 温伟杰[3] ZHOU Yannan;HUANG Yulong;LIU Hui;WANG Jialei;YANG Chao;WEN Weijie(Department of Electrical Engineering and Applied Electronics,Tsinghua University,Beijing 100084,China;Energy Internet Research Institute,Tsinghua University,Chengdu 610042,China;Key Laboratory of Smart Grid of Ministry of Education,Department of Electrical Engineering and Automation,Tianjin University,Tianjin 300072,China)

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]清华大学能源互联网研究院,成都610042 [3]天津大学电气与自动化学院智能电网教育部重点实验室,天津300072

出　　处：《高电压技术》2020年第9期3325-3333,共9页High Voltage Engineering

基　　金：国家重点研发计划(2017YFB0902400);国家自然科学基金(51677095)。

摘　　要：针对混合式高压直流断路器工况的特殊要求,该文设计了一种110 kV快速机械隔离开关的新型断口。该断口是以SF6气体作为绝缘介质,并采用平板对接式的触头结构。通过优化动静触头的位置,可以缩短动触头导电杆长度,减小运动部件质量,从而满足快速机械开关在快速分合闸上的要求。为了紧凑化设计复合套管,并减小隔离开关的大小,通过仿真电场分布情况来优化复合套管的内径参数。最后,为了使触头结构具有更好的绝缘能力,设计了一种双圆弧组合形状作为触头结构,并使用下降法对触头的结构参数进行优化。该研究成果为混合式直流断路器向高电压等级发展提供了技术支持。According to the special requirements of the condition of hybrid HVDC circuit breaker,a new type of break in 110 k V ultra-fast disconnector was designed in this paper.SF6 gas was used as the insulating medium and a flat plate structure was adopted in the break.By optimizing the position of the moving and static contacts,the length of the conductive rod of the moving contacts could be shortened,and the mass of the moving parts could be reduced to meet the requirements of the fast opening and closing operation.In order to compactly design the insulated sleeve and reduce the size of the ultra-fast disconnector,the internal diameter parameter of the insulated sleeve was optimized by simulating the electric field distribution.Finally,in order to make the contact structure to possess better insulation capacity,a double-arc combined shape was designed as the contact structure,and the structural parameters of the contact were optimized by using the descent method.The research results provide technical support for the development of hybrid DC circuit breaker in high voltage level.

关 键 词：混合式直流断路器 快速隔离开关 触头 SF6气体 绝缘性能 

分 类 号：TM564.1[电气工程—电器]